Lock shell



FIG. 1 is a front, side and right perspective view of a lock shell showing our new design. The dotted line portions are for reference only and do not form a part of our design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side plan view thereof; and,

FIG. 6 is a right side plan view thereof. 

The ornamental design for a lock shell, substantially as shown and described. 